I very much hope that sites and [in-browser] apps will merge eventually. An 'app' will be just the 'site' adjusted to the features available on your device, with niceties which a local app can afford: precached data, integration with other parts of the platform, etc.
Of course, 'site' will always be there, as long as the 'browser' concept is around.

I've been an eBay user since 1999, and I still frequent eBay as both buyer and seller. In that time, eBay has transformed from a place where geeks sell broken laser pointers to each other, into a global marketplace where businesses sell anything and everything to customers. If you're looking fo...